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Milwaukee, Wisconsin – A rare Midwest earthquake early Tuesday is now raising awareness across Wisconsin as a powerful blast of Arctic air sends temperatures plunging into extreme territory, creating conditions that could trigger frost quakes during the coldest overnight hours.
According to the U.S. Geological Survey, a 3.5 magnitude earthquake struck central Illinois shortly before 2 a.m. Tuesday, centered about 35 miles south of Springfield. The shallow quake was felt across a wide portion of Illinois, with thousands reporting shaking and loud rumbles before sunrise. While no damage was reported, seismic events of this size are uncommon in the Midwest, making the timing notable as dangerous cold settles across the region…